Well Basics for Rural Homes

Who is responsible for a private well?

Public water systems are monitored by a utility and a state program. A private household well is different. In most places the owner decides when to test, what to treat and when to repair. That freedom comes with real responsibility, because nobody else will notice a change in your water.

Rules about private wells vary by state and often by county. Some areas require testing when a property sells, some regulate how wells are drilled and sealed, and some say very little. Your county health department or state environmental agency can tell you what applies where you live.

• Find out whether your county keeps a well record for your property
• Ask who drilled the well and keep their contact details
• Keep every receipt and report in one folder

What are the main parts of a well?

Most household wells share the same basic pieces: a drilled or dug hole into groundwater, a casing that keeps the hole open and keeps surface water out, a pump, a pressure tank and the pipes that carry water to the house. A cap or cover at the top keeps insects, animals and runoff out of the well.

Walk the property and find the wellhead. Look at its cap, the ground around it and anything stored nearby. Knowing where it is also keeps you from driving equipment over it or spreading chemicals close to it.

• Wellhead: the visible top of the casing, often a metal or plastic cap
• Pump: either down in the well or at the house, depending on the design
• Pressure tank: holds water so the pump does not run constantly

What should I do in the first month after moving in?

Start with paperwork. Ask the seller or the county for any drilling record, past water test results and pump or tank service history. If there is none, that is useful information too, and it means a fresh test and an inspection are worth arranging.

Next, have the water tested through a certified laboratory. Your county health department or state drinking water program can point you to labs and tell you which tests make sense for your area. Do not guess which contaminants matter. Local geology and land use change the answer.

• Ask the county for well records and any past test results
• Have the water tested through a certified lab
• Have a licensed well contractor look over the system if its age or condition is unknown

How do I keep contamination away from the well?

Anything spilled or spread near the wellhead can end up in your drinking water. Fuel, pesticides, fertilizer, livestock waste, old paint and septic effluent are common concerns on rural property. Keeping them well away from the well, and keeping the ground around the well sloped so water drains away, is simple protection.

Be careful about abandoned wells too. An old unused well or cistern on the property can be a direct path for surface water into the aquifer, and it is also a hazard for children and animals. Ask your county health office or state agency how old wells should be properly closed and who is licensed to do it.

• Store chemicals and fuel away from the wellhead
• Keep animal pens and manure piles well away from it
• Do not dump oil, paint or cleaners on the ground
• Have unused wells properly closed by a licensed professional

What are the early warning signs of trouble?

Water that suddenly changes in taste, smell, color or clarity deserves attention. So does a pump that cycles more often, pressure that drops, or sputtering faucets. Some contaminants have no taste or smell at all, which is why testing matters more than your senses.

After a flood, a nearby spill, construction close to the well or a long dry spell, test again and ask the health department what to do in the meantime. If anyone in the household, especially an infant, an older adult or someone who is pregnant or ill, has unexplained stomach illness, mention the well water to their doctor.

• Cloudy, discolored or odd-smelling water
• Pump running more than usual
• Illness in the household with no clear cause
• Any flooding or spill near the wellhead

Who can I call for help?

Start local. Your county health department handles water questions for private wells in many areas, and your state drinking water or environmental agency can help where the county cannot. The EPA keeps general guidance for private well owners, and your cooperative extension office often offers practical workshops.

For repairs, use a licensed well contractor or pump installer where licensing exists. Ask for references, get the work described in writing and ask what was found as well as what was done. A good contractor is happy to explain.

Last reviewed: November 12, 2026. Written by the Rural Farm Life Editorial Team. See our editorial policy.